From owner-freebsd-net@FreeBSD.ORG  Thu Jun 29 22:57:22 2006
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Date: Thu, 29 Jun 2006 17:27:35 -0500
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Thread-Topic: Query :Regading IPv6 logo phase 1 
Thread-Index: AcabpSaIOE1t9y2sTYux53BvJtYvBwAJXtcg
From: "Jeewan Rana" <jrana@nortel.com>
To: <freebsd-net@freebsd.org>
Subject: Query :Regading IPv6 logo phase 1 
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Hi all,
To getting the IPv6logo  phase 1 , Interoperability test case  is
necessary or only self-test case result is enough to get ipv6 logo phase
1.
Reagards
jeewan

-----Original Message-----
From: owner-freebsd-net@freebsd.org
[mailto:owner-freebsd-net@freebsd.org] On Behalf Of Haisang Wu
Sent: Thursday, June 29, 2006 10:46 AM
To: freebsd-net@freebsd.org
Subject: Reading m_flags in tcp_output and tcp_input

Hello,

  I need to read m_flags of a mbuf in an TCP application in the
following
two cases:

(1) in sending direction, right before TCP calls ip_output() to send out
a
packet,
(2) in receiving direction, right before TCP appends a packet to so_rcv
of
the corresponding socket and wakes up the socket.

  My understandings are: for (1), tcp_output() only calls ip_output()
once,
so right before that function call, I should read the m_flags.
For (2), tcp_input() is more complex and calls insbappendstream_locked()
twice, one for fast path processing, and one for slow path processing. I
think I should read m_flags before both of the two
insbappendstream_locked()
function calls.

  I am using freebsd 5.4. Could you let me know whether my above
understandings are correct, and provide some suggestions?

Thank you!
Haisang
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